Android Handout Second Edition Viewswitcher + gesturedetector Exercises

To add gesture monitoring:

1     Gesturedetector detector; // Gesture Listening

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1 New Gesturedetector (Getapplicationcontext (),2                 new Mygesturelistener ());

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Gesture listening Specifies the screen slide effect and display image in Onfling:

1 classMygesturelistenerImplementsOngesturelistener {2         //trigger This method when the touch event is pressed3 @Override4          Public BooleanOndown (Motionevent event) {5             return false;6         }7 8         //the user triggers the method by dragging it over the touchscreen9 @OverrideTen          Public Booleanonfling (motionevent event1, motionevent Event2, One                 floatVelocityx,floatvelocityy) { A (GridView) Viewswitcher.getnextview ()). Setadapter (adapter); -             if(Event2.getx ()-Event1.getx () >flip_distance) { -                 if(Screenno > 0) { thescreenno--; -                     //Add a screen animation toggle effect -Viewswitcher.setinanimation (animations[0]); -Viewswitcher.setinanimation (animations[3]); + viewswitcher.showprevious (); -                     return true; +}Else { AToast.maketext (Getapplicationcontext (), "No More Pages", at Toast.length_long). Show (); -                 } -}Else { -                 if(Screenno < ScreenCount-1) { -screenno++; -Viewswitcher.setinanimation (animations[1]); inViewswitcher.setinanimation (animations[2]); - Viewswitcher.shownext (); to                     return true; +}Else { -Toast.maketext (Getapplicationcontext (), "No More Pages", the Toast.length_long). Show (); *                 } $             }Panax Notoginseng             return false; -         } the  +         //the user triggers the method on the screen long and on time A @Override the          Public voidonlongpress (Motionevent event) { +  -         } $  $         //trigger This method when the user scrolls on the screen - @Override -          Public Booleanonscroll (motionevent event1, motionevent Event2, the                 floatVelocityx,floatvelocityy) { -             return false;Wuyi         } the  -         //This method is triggered when the user presses on the touchscreen and has not moved and released Wu @Override -          Public voidonshowpress (motionevent arg0) { About  $         } -  -         //the user taps the event on the touch screen to trigger the method - @Override A          Public BooleanOnsingletapup (motionevent arg0) { +             return false; the         } -  $}

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Enter the first interface to show the code:

1  Public voidNext (View v) {2         if(Screenno = =-1) {3screenno++;4 (GridView) Viewswitcher.getnextview ()). Setadapter (adapter);5 Viewswitcher.shownext ();6}Else {7Toast.maketext (Getapplicationcontext (), "No More Pages", Toast.length_long)8 . Show ();9         }Ten}

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Define Baseadapter:

1 PrivateBaseadapter adapter =NewBaseadapter () {2 @Override3          Public LongGetitemid (intposition) {4             returnposition;5         }6 7 @Override8          PublicDataItem GetItem (intposition) {9             returnTotal.get (Screenno * number_per_screen +position);Ten         } One  A @Override -          Public intGetCount () { -             if(Screenno = = ScreenCount-1 the&& total.size ()% Number_per_screen! = 0) { -                 returnTotal.size ()%Number_per_screen; -             } -             returnNumber_per_screen; +         } -  + @Override A          PublicView GetView (intposition, View Convertview, ViewGroup parent) { atView view =Convertview; -             if(Convertview = =NULL) { -View = Layoutinflater.inflate (R.layout.labelicon,NULL); -             } -ImageView ImageView =(ImageView) View.findviewbyid (R.id.imageview); - imageview.setimagedrawable (GetItem (position). drawable); inTextView TextView =(TextView) View.findviewbyid (R.id.textview); - Textview.settext (GetItem (position). Dataname); to             returnview; +         } -};

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Here is just crazy Android handout in Viewswitcher gesture added to do a small demo, I am in the beginner stage, if there is wrong place, please make a lot of corrections!!

Android Handout Second Edition Viewswitcher + gesturedetector Exercises